Synthetic caoutchouc.



10 Sumner Terrace,

ARTHUR HEINEMANN, OF SOUTH KENSINGTON, LONDON, ENGLAND.

SYNTHETIC CAOUTCHOUC.

No Drawing.

To all whom it may concern:

Be it known that I, ARTHUR HEINEMANN, a subject of the King of Prussia,residing at Onslow Square, South Iiensington, London, S. 7., England,have invented new and useful Improvements Relating to SyntheticCaoutchouc, of which the following is a specification.

wo of the most valuable properties of natural caoutchouc are itselasticity and resiliency. These qualities are due to the structurearising from the presence of proteids, or, as they are sometimes termed,proteins.

The object of the present invention is to impart to syntheticallyproduced caoutchouc the above referred to properties of naturalcaoutchouc and consists in the addition of proteids or proteins, suchas'those enumerated below, to liquid hydrocarbon from which syntheticcaoutchouc may be produced.

The following is an example of a way in which the invention may becarried out According to this example 2 parts of the proteid or proteinaremixed or are emulsified with 100 parts of the hydrocarbon, forinstance isoprene, from which synthetic caoutchouc can be produced; Theisoprene so treated is then converted into caoutchouc in any knownmanner.

Instead of employing the additive sub- Specification of Letters Patent.Application filed January 23, 1912. Serial stance or substances in theproportions above referred to the amounts thereof may be variedaccording, to the quality of caoutchouc to be produced, that is to saythe properties which it will possess as compared with the naturalsubstance.

It is to bc under-stood that the proteid or protein may, so long as itimparts to the convertible hydrocarbon, the desired properties, be ofvegetable'or animal origin. he added substances may consist, forinstance, of keratin, pure proteins or peptones.

Having now described my invention what I have invented and desire tosecure by Letters Patent of the United States is as follows A method ofimparting to synthetic caoutchouc obtainedv fromisoprene the elastic andresilient properties peculiar to natural caoutchouc consisting in addinga protein obtained from vegetable or animal sources .to said isopreneand then converting the mixture into caoutchouc, substantially asdescribed herein.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ARTHUR HEINEMANN.

Witnesses ROBERT FRIDLEY, BARTLEY F. Yos'r.

Patented Aug. 13, 1912.

